%0 Conference Proceedings %T Assessment of neutron shielding effect on photoneutron dose reduction produced in high-energy linear accelerator %A Mohammadi, Najmeh %A Miri Hakimabad, Seyyed Hashem %A Rafat Motavali, Laleh %A فاطمه اکبری %A سارا عبداللهی %J Siemens Radiotherapy Users Meeting %D 2014